With all due respect, N24 is a whole different breed in comparaison of standard WEC rounds (apart from LM which has a +60 cars grid)
The N24 has at best 150/160 cars on track!! Which I assume would be a technical nightmare for PD to implement in the game...
But it doesn't mean they won't try to extend the grid in the future (future update or GT8?), we've had enduro races on GT since the dawn of man (lookin' at you GT1 300km at Grand Valley and SS11 all night 😅)
Endurance races are an indeniable part of Gran Turismo's DNA, and Kaz always wanted the feel of a real life experience for his games.. (Rigs, GT Academy, PSVR,...etc) Having a "traffic" when you race the fastest cars (GTP/Hypercars/GT3/GT4) is what real life experience is all about ^^
Like you, I trully wish that we had extended grid for the game broski..
Having done a 24h custom race at the Nurb with Sophy (pictures), it was really fun! But from time to time it felt like I was driving alone on the track, despite me adding slower cars on the grid :\
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PS : One last thing, I remember that rally event on GT6 at Sierra, we had something like roughly 70 cars on? Yes they were more like obstacles you had to drive around with the basic AI, but still it was pretty cool.
And at the N24, don't the SP9 drivers sees slower cars like obstacles they have to move around as well? hehe